There's a guy called Dr. Joel Furhman (he has his own diets though please note I'm not advocating or advertising anything here...just quoting his scientific research) who believes 'throat hunger' is true hunger. Verbatim from a paper he's written with others, "Sensations such as fatigue, weakness, stomach cramps, tremors, irritability and headaches, commonly interpreted as “hunger”, resolve gradually for the majority of people who adopt a high nutrient density diet, and a new, less distressing, sensation (which we label “true” or“throat” hunger) replaces it."
Of course, if you set out to do internet research, especially on forum posts, people do equate the feeling with other syndromes, diagnoses etc. But since we're all adapting our diets here (and feeling hungry too!), I think its safe to assume that this might be it. Of course the crucial question here is - is anybody else experiencing this??
p.s.- If interested in the paper, you can Google "Changing perceptions of hunger" by him.